Exercise chair



FIG. 1 is a perspective view of an exercise chair showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and

FIG. 7 is a perspective view of the exercise chair rotated ninety degrees with its legs shown in an extended position. 

The ornamental design for an exercise chair, as shown and described. 